Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accounts receivable, net of allowance for doubtful accounts (in dollars)	$ 60,000	$ 66,000
Inventory, net of allowance for slow moving and obsolete inventory (in dollars)	$ 261,000	$ 401,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	21,833,003	21,744,768
Common stock, shares outstanding	21,833,003	21,744,768